[Clermond]

I have the jerk stopper from tethered tools but it does really keep port safe. I am looking for something more solid like the lockcirkle which I have for my Canon 5DM4. A damaged USB port can be very expensive and despite the stopper the cable slips out from time to time

[paulster]

I just use a JerkStopper with a loop on the cable long enough that movement on the cable isn't enough to dislodge it. I do know what you mean though, and the micro-B connector is pretty flimsy.

I haven't tried this, but if you have an Arca-Swiss plate on the site of the camera then this might work out for you, in terms of locking the cable down better. It still doesn't deal with the security of the plug itself though:
Cable Relief Spacer

[Clermond]

That's a good idea, paulster. Many thanks. I have ordered the cable relief spacer and will give a feedback as soon as I have it.

[Clermond]

the spacer arrived to day. It's quite big but it really keeps the cable safe. You need a hexa wrench to fix the spacer, I will look for a screw with a grip